Improvement in harrows



iloted gister,-

@atwt dtjijiiw.

CORNELIUS THYER AND LEMAN L. THOMAS, OF OTEGO, NEW YORK.

Letters Patent No. 106,7 42, dated Aug-ust 23, 1870.

IMPROVEMENT IN HARYROWS.

The Schedule xeferred to in these Letters Patent and making part o! the same To all whom it 'may concern.:

Be it known that we, CORNELIUS TrIAYEn and .LEMAN L. THOMAS, ofthe townof Otego, in the county of Otsego and State of New York, have n' rented anew and useful Self-cleaning Harrow; and we do declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing making a part of this specification. n Our harrow consists of a skeleton frame made of iron, to which the teeth of the harrow are attached by means of a unt upon the end of every tooth.

'This skeleton frame is then attached to the frame -of a harrow constructed of wood, through which the teeth of the skeleton-harrow pass freely; a standard and'lever are then attached to this woodenl frame, and

the short end of the lever isconnected to the skeleton frame-work eontaning the teeth, the long end of the lever extending back to the rear of the barrow; the team is attached to the wooden frame, and the driver, by operating the lever with a downward nio tion, raises the skeleton harrow so i'ar'as maybe necessary to allow it to pass freely overall obstructions and 

